/Engine/Source/Runtime/AudioMixer/Public/AudioMixerSubmix.h
Removes the given submix from this submix's children.
void RemoveChildSubmix ( [TWeakPtr](API\Runtime\Core\Templates\TWeakPtr)< [FMixerSubmix](API\Runtime\AudioMixer\FMixerSubmix), ESPMode::ThreadSafe > SubmixWeakPtr )